The following verses describe some of the Biblical basis for who we are in Christ.
There are a lot of references here, but that is because God has heaps to say about you.
1 Peter 1:23
For you have been born again, not of perishable seed, but of imperishable, through the living and enduring word of God.
1 John 2:12
I write to you, dear children, because your sins have been forgiven on account of his name.
1 John 1:9
If we confess our sins, he is faithful and just and will forgive us our sins and purify us from all unrighteousness.
2 Corinthians 5:17
Therefore, if anyone is in Christ, he is a new creation; the old has gone, the new has come!
1 Corinthians 6:19
Do you not know that your body is a temple of the Holy Spirit, who is in you, whom you have received from God? You are not your own;
Colossians 1:13
For he has rescued us from the dominion of darkness and brought us into the kingdom of the Son he loves,
1 Peter 1:18-19
For you know that it was not with perishable things such as silver or gold that you were redeemed from the empty way of life handed down to you from your forefathers, but with the precious blood of Christ, a lamb without blemish or defect.
Galatians 3:13
Christ redeemed us from the curse of the law by becoming a curse for us, for it is written: "Cursed is everyone who is hung on a tree."
Deuteronomy 28:2
All these blessings will come upon you and accompany you if you obey the LORD your God:
Galatians 3:9
So those who have faith are blessed along with Abraham, the man of faith.
Deut 28:13
The LORD will make you the head, not the tail. If you pay attention to the commands of the LORD your God that I give you this day and carefully follow them, you will always be at the top, never at the bottom.
Ephesians 1:4
For he chose us in him before the creation of the world to be holy and blameless in his sight. In love
1 Corinthians 1:8
He will keep you strong to the end, so that you will be blameless on the day of our Lord Jesus Christ.
Ephesians 2:13
But now in Christ Jesus you who once were far away have been brought near through the blood of Christ.
1 Corinthians 15:57
But thanks be to God! He gives us the victory through our Lord Jesus Christ.
John 8:36
So if the Son sets you free, you will be free indeed.
Ephesians 6:10
Finally, be strong in the Lord and in his mighty power.
Romans 6:11
In the same way, count yourselves dead to sin but alive to God in Christ Jesus.
Romans 8:37
No, in all these things we are more than conquerors through him who loved us.
Romans 8:17
Now if we are children, then we are heirs—heirs of God and co-heirs with Christ, if indeed we share in his sufferings in order that we may also share in his glory.
Ephesians 1:13
And you also were included in Christ when you heard the word of truth, the gospel of your salvation. Having believed, you were marked in him with a seal, the promised Holy Spirit,
Galatians 4:7
So you are no longer a slave, but a son; and since you are a son, God has made you also an heir.
1 Corinthians 1:30
It is because of him that you are in Christ Jesus, who has become for us wisdom from God—that is, our righteousness, holiness and redemption.
Ephesians 1:6
to the praise of his glorious grace, which he has freely given us in the One he loves.
Colossians 2:10
and you have been given fullness in Christ, who is the head over every power and authority.
Galatians 2:20
I have been crucified with Christ and I no longer live, but Christ lives in me. The life I live in the body, I live by faith in the Son of God, who loved me and gave himself for me.
Ephesians 2:4-5
But because of his great love for us, God, who is rich in mercy, 5made us alive with Christ even when we were dead in transgressions—it is by grace you have been saved.
Romans 8:1
Therefore, there is now no condemnation for those who are in Christ Jesus,
2 Corinthians 5:18
All this is from God, who reconciled us to himself through Christ and gave us the ministry of reconciliation:
Colossians 1:12
giving thanks to the Father, who has qualified you[a] to share in the inheritance of the saints in the kingdom of light.
Colossians 2:7
rooted and built up in him, strengthened in the faith as you were taught, and overflowing with thankfulness.
Ephesians 2:19
Consequently, you are no longer foreigners and aliens, but fellow citizens with God's people and members of God's household,
Ephesians 2:20
built on the foundation of the apostles and prophets, with Christ Jesus himself as the chief cornerstone.
1 John 5:18
We know that anyone born of God does not continue to sin; the one who was born of God keeps him safe, and the evil one cannot harm him.
Ephesians 5:1
Be imitators of God, therefore, as dearly loved children
Ephesians 1:3
Praise be to the God and Father of our Lord Jesus Christ, who has blessed us in the heavenly realms with every spiritual blessing in Christ.
John 13:34-35
"A new command I give you: Love one another. As I have loved you, so you must love one another. By this all men will know that you are my disciples, if you love one another."
Matthew 5:14
You are the light of the world. A city on a hill cannot be hidden.
Matthew 5:13
"You are the salt of the earth. But if the salt loses its saltiness, how can it be made salty again? It is no longer good for anything, except to be thrown out and trampled by men.
2 Corinthians 5:21
God made him who had no sin to be sin for us, so that in him we might become the righteousness of God.
2 Peter 1:4
Through these he has given us his very great and precious promises, so that through them you may participate in the divine nature and escape the corruption in the world caused by evil desires.
2 Timothy 1:9
who has saved us and called us to a holy life—not because of anything we have done but because of his own purpose and grace. This grace was given us in Christ Jesus before the beginning of time,
James 1:18
He chose to give us birth through the word of truth, that we might be a kind of first fruits of all he created.
Ephesians 1:4
For he chose us in him before the creation of the world to be holy and blameless in his sight. In love
2 Corinthians 5:20
We are therefore Christ's ambassadors, as though God were making his appeal through us. We implore you on Christ's behalf: Be reconciled to God.
Ephesians 2:10
For we are God's workmanship, created in Christ Jesus to do good works, which God prepared in advance for us to do.
1 Peter 2:24
He himself bore our sins in his body on the tree, so that we might die to sins and live for righteousness; by his wounds you have been healed.
2 Corinthians 3:18
And we, who with unveiled faces all reflect the Lord's glory, are being transformed into his likeness with ever-increasing glory, which comes from the Lord, who is the Spirit.